[solved] Weather effect without stage

[Yinseko]

How can i creat effect of weather (snow, rain , ect) , that can be activated by player in any battle.
for example char casting some spell and while casting rain is appear.
i was try to use very large picture with 3 frames (for animation) and using state 9998 (now massage, without shadow) but it looks afwul using this method =\